"AI SEO audit tool" now covers two products that have almost nothing in common. One is a site crawler that has added a machine learning layer to how it prioritises the errors it finds. The other checks something genuinely new: whether ChatGPT, Perplexity and Google's AI answers can read your pages and are willing to cite them.
Both categories use the same phrase in their marketing, so buyers routinely purchase the first when they wanted the second. This list says which of the two each tool is, in its own entry, before anything else about it.
How we checked this list
All sixteen were loaded on their live sites in August 2026 and screenshotted, so every product here resolved and is real. Anything that 404ed, timed out or turned out to be a parked domain was cut before writing.
Prices move constantly on this category and several vendors now hide them behind a demo request. Rather than quote figures that will be wrong within a quarter, each entry says whether a free tier exists and what the free tier actually returns, which is the part that does not change.
A note on what we make
We build SEO software, and it is not an audit tool. There is no entry for our own product in the sixteen below, because a page that ranks its publisher first without a genuine category fit is worth less than one that does not mention itself at all.
Distribb appears once, at the end, where the subject changes to the part of the job we do cover. Everything in the list is judged on its own merits.
The two things "AI SEO audit" means in 2026
| Classic technical audit | AI visibility audit | |
|---|---|---|
| What it crawls | Your site, as Googlebot sees it | Your site, as an LLM crawler sees it |
| Typical findings | Broken links, redirect chains, slow pages, missing tags | Unreadable JavaScript, thin structured data, no citable claims |
| What it improves | Blue link rankings | Whether an AI answer names you |
| Maturity | Twenty years old, very reliable | Two years old, still settling |
Most sites need the first and have never run the second. If you have not crawled your site this year, start in the classic column and ignore the AI framing entirely.
Tools that audit AI and LLM visibility
1. WordLift AI Audit, the free check for whether LLMs can read you
This is the clearest example of the second category. It looks at machine readability, structured data quality, whether your content survives JavaScript rendering, and whether AI agents can reach your pages at all.
It is free and returns a result without a sales call, which is rare in this corner of the market. Run it once even if you buy nothing, because the JavaScript rendering finding alone catches a failure mode that classic crawlers report as healthy.
The catch: it audits readiness, not results. It cannot tell you whether ChatGPT currently cites you, only whether it could.
2. Semrush Site Audit, the classic crawl with AI checks bolted on properly
Semrush did the sensible thing and added AI search checks to an audit engine that was already mature, rather than launching a separate product. You get the full technical crawl plus flags for issues that specifically affect AI answer engines.
It is the safest single purchase here if you only buy one, because the classic half is genuinely excellent and the AI half is a bonus rather than the whole pitch.
The catch: the audit is one module of a large suite, and you pay for the suite. Crawl limits on the entry plan are tight for sites over a few thousand pages.
3. SEOptimer, instant audit plus a GEO section
Enter a URL and get a graded report across roughly a hundred data points, with no account required for the first look. Recent versions added a generative engine optimisation section covering how the page reads to an LLM.
It is also the tool most agencies reach for when they need a branded audit PDF to attach to a proposal, which is a different job from fixing your own site.
The catch: the free report is a lead magnet and stays fairly shallow. Depth needs the paid plan.
4. Sintra, the AI employee framing
Sintra packages SEO work as an autonomous AI assistant rather than a dashboard of errors, and its audit runs as one task among several it will take on. If you want findings plus a first pass at acting on them, this is the model.
The catch: the autonomy is the product, and it is not for anyone who wants to see the raw crawl data and make their own calls. Treat its output as a draft.
The serious technical crawlers
5. Ahrefs Site Audit, the deepest error catalogue
Ahrefs checks for over 170 issues and sorts them into errors, warnings and notices, which matters more than the raw count. A list of 900 problems is useless without a defensible order to fix them in, and this is the tool that orders them best.
The crawl visualisations also make internal linking problems obvious in a way a spreadsheet never does.
The catch: it is priced as part of a suite aimed at professionals, and there is no meaningful free tier for the audit beyond a verified site allowance.
6. Screaming Frog SEO Spider, free to 500 URLs and still the standard
The desktop crawler almost every technical SEO actually uses. Broken links, redirect chains, duplicate titles, missing tags, orphaned pages, all of it, and the first 500 URLs cost nothing.
For a small site, 500 URLs is the entire site. There is no reason to pay for a technical audit before you have run this.
The catch: it hands you a spreadsheet and assumes you know what to do with it. Nothing is prioritised for you, and there is no AI layer of any kind.
7. Sitebulb, the crawler that explains itself
Sitebulb's difference is that every finding comes with a written explanation of why it matters and what to do. That sounds cosmetic and is not, because it is the difference between an audit a junior can act on and one that needs a specialist to interpret.
The catch: it is a desktop application first, so it fits an individual auditor better than a team that wants shared dashboards.
8. Lumar, built for very large sites
Formerly DeepCrawl, and aimed squarely at sites where a crawl runs into the millions of URLs. It handles scale, scheduled monitoring and integration into engineering workflows rather than one-off reports.
The catch: enterprise pricing and enterprise sales process. Overkill for anything under a few thousand pages.
9. SE Ranking, the audit agencies rebrand
A competent full crawl inside a suite that costs meaningfully less than the two market leaders, with white label reporting that lets agencies put their own name on the output. That combination is why it appears on nearly every agency list.
If rebranding the report is the actual requirement, our comparison of white label SEO audit tools covers how far each vendor lets the branding go, because "white label" means three different things across these products.
The catch: the crawl is good rather than best in class. If forensic depth is what you need, Ahrefs or Sitebulb will find more.
10. Sitechecker, audit plus ongoing monitoring
Positioned around continuous monitoring rather than the one-time report, so it alerts you when something breaks instead of waiting for you to remember to re-run a crawl. That framing suits sites that ship changes weekly.
The catch: a smaller crawler than the enterprise options, and the value depends on you actually reading the alerts.
The free checks worth running first
11. Google Search Console, the only source that is not an estimate
Every tool above is inferring what Search Console reports directly: which queries showed your pages, how often, at what position, and how many people clicked. Its Pages report also tells you exactly which URLs Google refused to index and why.
No audit is complete without this, and it is free. Start here, always.
The catch: it only knows about pages and queries you already appear for, and the indexing reasons are sometimes maddeningly vague.
12. PageSpeed Insights, the performance half
Core Web Vitals from Google's own lab and field data, free, with a specific list of what is slowing the page. Most paid audits are reporting a version of this number back to you.
The catch: it tests one URL at a time, so it is a spot check rather than a site audit.
13. Seobility, the most generous free tier
The free plan crawls a real number of pages rather than teasing you with five, and covers on-page, technical and basic link checks. For a small site this is a genuine audit rather than a sample.
The catch: the interface is dated, and the free crawl limit arrives quickly once a site grows.
14. WooRank, the fast second opinion
An instant graded review of a single site, useful as a sanity check against whatever your main crawler said. Agencies also use it for quick prospect reports.
The catch: it is a scored summary, not a forensic crawl, and the single score hides more than it shows.
15. SEO SiteCheckup, straightforward pass and fail
A plain checklist of technical tests with clear pass and fail states and no interpretation layer. That is exactly what you want when you are verifying one specific fix rather than exploring.
The catch: limited free checks per day, and no crawl of the wider site.
16. AIOSEO SEO Analyzer, the WordPress option
Free to run against any URL, but its real value is inside WordPress, where it audits the site and then lets you fix most of what it finds without leaving the admin. Shortening the distance between finding and fix is worth more than a slightly deeper report you never act on.
The catch: outside WordPress it is an ordinary free checker.
How to choose without overbuying
Run Search Console and Screaming Frog first. Between them they are free, and they will find the majority of what a paid tool would report on a site under 500 pages. More of that category is collected in our list of free AI SEO tools.
Buy a paid crawler when the free pass produces more problems than you can order sensibly, or when a client is paying for the report. Add an AI visibility check only once the classic issues are cleared, because an LLM cannot cite a page that Google could not index either. Ordering the work that follows is its own problem, and we compared SEO project management tools for it.
The part an audit does not do
Every tool on this page tells you what is wrong. None of them fixes it, and the gap between a 400-item audit and a site that has actually improved is months of writing, publishing and internal linking that somebody has to do. Tools that try to close that gap are compared in our guide to Outrank alternatives.
That is the part Distribb automates: keyword research, article writing, publishing straight into your CMS, and internal links maintained as the library grows. Its backlink exchange covers the off-page side without paying per placement. It does not crawl your site for technical errors, which is why it is not one of the sixteen above, and there is a 3-day free trial if you want to see the content half working. Our explainer on how an AI internal linking tool works covers that last piece on its own.
For the wider category, our guide to SEO audit tools covers the non-AI options in more depth, and automated SEO software covers what happens after the audit.